By the numbers
Last updated:
Published by Book Profits Club
Most self-published authors earn modest amounts: ISBNdb reports that roughly 75% earn less than $1,000 per year, while only the top 0.5% earn six figures or more.
Income is concentrated at the top and grows with catalog size. Book Profits Club collected the published figures below so authors can plan with real numbers: market size, author income by number of titles, ad costs, and social media engagement. Each figure links to its source, and none are Book Profits Club's own results.
This page is part of our main guide to book marketing for self-published authors. Start there for the full system, then come back here for the details.
Reading the data
Taken together, these published figures say three things. The self-publishing market is large and growing, which means more competition for attention. Income rises with the number of titles, which rewards authors who keep publishing. And organic social media converts a small share of followers, which is why Book Profits Club encourages authors to move followers onto an email list and toward an offer beyond the book.
Our standard
Every number is quoted as its source published it, including its full range and conditions. We do not round figures, combine sources, or present published statistics as Book Profits Club's own. Where a figure comes from a survey or one author's data, we say so. See our methodology.
$1.85 billion
Global self-publishing market in 2024, expected to reach $6.16 billion by 2033.
Source: ISBNdb, "Self-Publishing Is Changing the Book Industry"
2.5M to 3.5M+
Self-published print and ebook works rose from 2.5 million to more than 3.5 million in 2024.
Source: ISBNdb, "Self-Publishing Is Changing the Book Industry"
32.5%
ISBNdb quotes that in 2025 works with ISBN numbers jumped 32.5% over 2024.
Source: ISBNdb, "Self-Publishing Is Changing the Book Industry"
$5 billion
Kindle Unlimited has passed $5 billion in author payouts, as reported in the article.
Source: Self-Publishing Advice, "Written Word Media Opens 2026 Indie Author Survey"
About 75%
Roughly 75% of self-published authors earn less than $1,000 per year, while only the top 0.5% earn six figures or more.
Source: ISBNdb, "Self-Publishing Is Changing the Book Industry"
Under $100/mo
Authors with one to three books overwhelmingly earn under $100 a month.
Source: Self-Publishing Advice, "Written Word Media Opens 2026 Indie Author Survey"
40%
Of authors with twenty-five or more titles, 40 percent earn more than $5,000 a month; those earning $10,000 or more a month generally have over sixty titles.
Source: Self-Publishing Advice, "Written Word Media Opens 2026 Indie Author Survey"
50%
Half of 600 indie authors surveyed mid-year expect their income to increase in the next 12 months.
Source: "What 600 Indie Authors Just Told Us About 2026 (Mid-Year Survey)" on YouTube
$0.30 to $0.60
Average Amazon Ads cost per click, with a 2 to 5% conversion rate.
Source: Manuscript Report, "Ads for Indie Authors: Guide to Boost Book Sales"
$0.50 to $1.00
Average Facebook Ads cost per click, with a 1 to 3% conversion rate.
Source: Manuscript Report, "Ads for Indie Authors: Guide to Boost Book Sales"
$150 to $300
Suggested monthly ad budget for meaningful results, expecting 60 to 90 days to achieve profitability.
Source: Manuscript Report, "Ads for Indie Authors: Guide to Boost Book Sales"
About 0.25%
It is normal to get well under 1%, more like 0.25%, of followers to take action on a given update.
Source: BookLaunch, "Social Media Marketing for Authors: What Does the Data Say?"
0.02% to 0.09%
Engagement rate considered good; 0.09% to 0.33% is high; over 0.33% is very high and rare.
Source: BookLaunch, "Social Media Marketing for Authors: What Does the Data Say?"
About 4%
A quick influencer check: are a creator’s likes at least about 4% of their following?
Source: Charlie’s Book Recs, "Book Launch: A 3 Month Instagram Marketing Guide"
15%
The standard cost of a literary agent is a 15% commission.
Source: Mary Adkins, "All the Numbers in Publishing That No One Talks About"
$50,000 to $70,000
Based on the author’s data, typical advance size for debut authors in the US.
Source: Mary Adkins, "All the Numbers in Publishing That No One Talks About"
Calculator
| Royalty per copy | Copies for $10,000 | Copies for $50,000 | Copies for $100,000 |
|---|---|---|---|
| $2 | 5,000 | 25,000 | 50,000 |
| $4 | 2,500 | 12,500 | 25,000 |
| $10 | 1,000 | 5,000 | 10,000 |
Income is highly concentrated. ISBNdb reports that roughly 75% of self-published authors earn less than $1,000 per year, while only the top 0.5% earn six figures or more. That is why a plan matters: authors who treat a book as part of a business, with an email list, more titles, and offers beyond the book, give themselves more ways to earn.
More on this in the FAQDivide $100,000 by what you earn per copy. At $2 per copy you would need 50,000 sales, at $4 per copy 25,000, and at $10 per copy 10,000. That math is why many authors add higher-value offers such as coaching or courses, where one client can equal many book sales. Use the calculator on our statistics page to run your own figures.
More on this in the FAQSelling 5,000 copies is a meaningful result for most self-published authors, given that roughly 75% of self-published authors earn less than $1,000 per year, according to ISBNdb. Whether it is good for you depends on your royalty per copy, your costs, and what your readers buy next from you, such as another book or a coaching offer.
More on this in the FAQAn author earns the list price times the royalty rate, minus any printing or delivery costs the platform deducts. As simple arithmetic, a 10% royalty on a $25 book would be $2.50 per copy and a 15% royalty would be $3.75. Self-published print and ebook royalties are calculated differently, so confirm the rate in your contract or platform dashboard.
More on this in the FAQIt depends on the format, list price, and royalty rate set by your platform or contract, so there is no single answer. Published survey data shows earnings usually start small: authors with one to three books overwhelmingly earn under $100 a month, according to coverage of the Written Word Media survey on Self-Publishing Advice. Check your platform’s royalty page for exact rates.
More on this in the FAQISBNdb reports that the global self-publishing market reached $1.85 billion in 2024 and is expected to reach $6.16 billion by 2033. The same analysis says the number of self-published print and ebook works rose from 2.5 million to more than 3.5 million in 2024. More books means more competition, which makes a clear marketing plan more important.
More on this in the FAQBook Profits Club has a free Standard membership, Premium at $47/month, and VIP Elite at $97/month.
Published by Book Profits Club
